Here's the optimized English version with professional DDD terminology and structure:

see https://github.com/c5ms/modern-ddd-cargotracker

Modern DDD Project Structure Guide

This repository demonstrates a contemporary DDD implementation architecture suitable for complex business systems. Below are its core organizational principles and technical implementations:

I. Layered Architecture Design

1. Domain Layer

   • Independent JAR package containing pure business logic
   • Framework-agnostic (no Spring dependencies)
   • Components:
     • Aggregate Roots (Cargo/Voyage)
     • Value Objects (DeliverySpecification)
     • Domain Services (RoutingService)
     • Domain Events (CargoHandledEvent)

2. Application Layer

   • Coordinates domain layer operations
   • Implements CQRS pattern for read/write separation
   • Components:
     • Command Handlers (CargoCommandHandler)
     • Query Services (CargoQueryService)
     • Event Publishers (EventPublisher)

3. Infrastructure Layer

   • Technical implementation details:
     • JPA Repositories (CargoRepositoryImpl)
     • ActiveMQ messaging
     • Strategy pattern implementations (ThreadPool/MessageQueue strategies)
   • Async domain event processing via Spring JMS

II. Key Design Patterns

1. CQRS Architecture

   • Command Side: Handles business mutations
   • Query Side: Provides optimized read views
   • Uses Event Sourcing for eventual consistency

2. Strategy Pattern

   • Report processing strategies (ReportStrategy interface)
   • Supports ThreadPool/MessageQueue/direct execution
   • Spring-autowired strategy injection

3. Event-Driven Architecture

   • Async event processing (CargoHandledEvent)
   • JMS-based event bus implementation
   • Event sourcing storage support

III. Technology Stack

• Spring Boot 3: Simplified enterprise application development
• Spring Data JPA: Repository pattern implementation
• Spring Cloud: Distributed system support
• ActiveMQ: Messaging infrastructure
• Hibernate: ORM implementation
• JUnit 5: Testing framework
• Lombok: Code simplification

This structure demonstrates:

• Clean separation of concerns
• Testable domain logic
• Scalable architecture
• Event-driven communication
• Strategy-based extensibility

Would you like me to elaborate on any specific component or design pattern?